.appwrap {
    width: 100%;
    height: 100%;
    .header {
        height: 50px;
        background: red;
    }
    .content {
       height: calc(100% - 100px);
       background: pink;
       overflow-y: auto;
       .content1 {
           width: 100%;
           height: 100%;
           display: flex;
           flex-wrap: wrap;
       }
    }
    .footer {
        height: 50px;
        background: yellow;
    }
    dl {
        width: 50%;
        margin-top: 20px;
        dt {
            text-align: center;
        }
        dd {
            text-align: center;
        }
    }
}